Improvement in blow-off devices for steam-boilers



M. 3. mm.

BLOW-OFF DEVICES FOR STEAM-BOILERS. 110,184,108.

Patented NOV.7,18.7E,

UNITED STATES.

PATENT OFFICE.

MATHEW RHODA, OF ALLENTOWN, PENNSYLVANIA.

IMPROVEMENT lN BLOW-OFFDEVICES FOR STEAM-BOILERS.

Specification forming part of Letters Patent N0. [84, [08, dated November 7, 1876; application filed September 22, 1876.

To all whom it may concern Be it known that I, MATHEW RHODA, of Allentown, county of Lehigh, and State of Pennsylvania, have invented a new and Improved Sreain-Boiler, of which 'the following is a specification:

In the accompanying drawing, Figure 1 represents a vertical central section of my improved steam-boiler on the line 00, Fig. 2; and Fig. 2, a horizontal section of the same on line as as, Fig. 1.

Similar letters of reference indicate corresponding parts.

My invention relates to such improvements in upright, tubular, and other boilers that the accumulation of mud and scale on the crownsheets and bottoms of the boilers is fully prevented by simple and efl'ective means, and thereby not only the duration of the boilers extended, but also the danger of accidents by such an accumulation of sediments avoided.

The inveniion consists of the combination of the crown-sheet and bottom of asteamboilcr, with exit-tubes, acommunicating-tube, and a bloW-ofi' cock.

In the drawing, A represents an upright, tubular, or other steam-boiler; and 'B, the crown-sheet ot' the same above the fire-place. O is'the bottom or base plate of the lower boiler-section, that encircles the fire-place. The mud sediment that gradually collects on the crown around the flue and on the bottom sheet destroy, in course of time, the efficacy of the sheets by the formation of thick layersof scale, soas to exert an injurious influence upon the boiler, and expose the same to the danger of bursting. For the purpose of obviating the formation of scale, and for keeping the crown and bottom sheets perfectly clean and efficient for work, I arrange anuinber of radial exit-tubes, D, near the crown and bottom sheets, and connect them by a tube, D, that extends around the outside of the boiler, and is provided with a blow-oif cock, E, which, on opening, admits the ready cleaning of the sheets of any sediments by the powerful agitation of the Water caused by the steam. By blowing ofi' any accumulating mud from time to time the crown and. bottom "sheets cannot be destroyed, so that the boiler MATHEW RHODA.

Witneseses:

PAUL GOEPEL, O. SEDGWIOK. 

